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Annotation of embedaddon/confuse/m4/longlong.m4, revision 1.1.1.1

1.1       misho       1: # longlong.m4 serial 8
                      2: dnl Copyright (C) 1999-2006 Free Software Foundation, Inc.
                      3: dnl This file is free software; the Free Software Foundation
                      4: dnl gives unlimited permission to copy and/or distribute it,
                      5: dnl with or without modifications, as long as this notice is preserved.
                      6: 
                      7: dnl From Paul Eggert.
                      8: 
                      9: # Define HAVE_LONG_LONG_INT if 'long long int' works.
                     10: # This fixes a bug in Autoconf 2.60, but can be removed once we
                     11: # assume 2.61 everywhere.
                     12: 
                     13: # Note: If the type 'long long int' exists but is only 32 bits large
                     14: # (as on some very old compilers), AC_TYPE_LONG_LONG_INT will not be
                     15: # defined. In this case you can treat 'long long int' like 'long int'.
                     16: 
                     17: AC_DEFUN([AC_TYPE_LONG_LONG_INT],
                     18: [
                     19:   AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int],
                     20:     [AC_LINK_IFELSE(
                     21:        [AC_LANG_PROGRAM(
                     22:          [[long long int ll = 9223372036854775807ll;
                     23:            long long int nll = -9223372036854775807LL;
                     24:            typedef int a[((-9223372036854775807LL < 0
                     25:                            && 0 < 9223372036854775807ll)
                     26:                           ? 1 : -1)];
                     27:            int i = 63;]],
                     28:          [[long long int llmax = 9223372036854775807ll;
                     29:            return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i)
                     30:                    | (llmax / ll) | (llmax % ll));]])],
                     31:        [ac_cv_type_long_long_int=yes],
                     32:        [ac_cv_type_long_long_int=no])])
                     33:   if test $ac_cv_type_long_long_int = yes; then
                     34:     AC_DEFINE([HAVE_LONG_LONG_INT], 1,
                     35:       [Define to 1 if the system has the type `long long int'.])
                     36:   fi
                     37: ])
                     38: 
                     39: # This macro is obsolescent and should go away soon.
                     40: AC_DEFUN([gl_AC_TYPE_LONG_LONG],
                     41: [
                     42:   AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
                     43:   ac_cv_type_long_long=$ac_cv_type_long_long_int
                     44:   if test $ac_cv_type_long_long = yes; then
                     45:     AC_DEFINE(HAVE_LONG_LONG, 1,
                     46:       [Define if you have the 'long long' type.])
                     47:   fi
                     48: ])